Joint



J'. T. KELLY Nov. 18, I930.

JOINT Filed March 12, 1 928 Patented Nov. 18,1930 V UNITED TATE-st Application filed March 12, 192a; Serial No. zeroes;

pointed out that one object of the present in- 1 vention is to provide an expansible jointin the casing around a steam pipeof the kind above mentioned, the construction being such that air leakage will be avoided, thus preventing air leaks into the smoke box of the forward end of the boiler. 7

It is within the province ofthe disclosure to improve generally and to enhance the utility of devices of that type to which the invention 2 appertains. V V 5 o 'VVith the above and other objects in View,

which will appear as the description proceeds, the'invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes inthe precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit'of the invention. v In the accompanying drawings Figure 1 shows in elevation,a device constructed in accordance with the invention;

7 Figure 2 is a longitudinalsection; a Figure 3 is a cross section on the line 3+ of Figure 2. V

The numeral 1 marks'the-steam chest or cylinders of a locomotive engine. That por tion of the shell of the boiler which forms the 40 smoke box, is designated by the numeral 2.

At 3 is shown the pipe which receives steamfrom the boiler and discharges the steam into the steam chest or cylinders 1. The steam is discharged from the steam chest or cylinders through the exhaust ports in the cylinders into the nozzle stand (not shown) as exhaust, into the smoke stack (not shown) The pipe'3 is secured in any desired way, as shown at 4, to the steam chest 1. r

In carrying out the invention, there is pro sidered desirable.

vided a tubular" casing which, as ;a ;whole is designated by'thenumeral'fi; The casingf5 is madenp of tubular members 6and- 7 The 1 upper end of the [member ,6 isl welded, shown at) 8,; to thefishell 2,, about the opening i 9through which the pipe 3 passes, J The "pipe; V 1 extends through themembersfi and-70f the casing 5. The lowerfendof the member T is received-within the annular -flange 10, of'a jcolla'irillwhichhas anairtight around the pi e3.'1 Calking, or any other, common expe' ient, may be'resorted to in order toobtain I I i a tight joint where the pipe 3 passes through the collar 11. The numeral 12 designates an 7 V l annular intermediate piece which, in cross section,'istrough shaped asshown in Figure 2 of the drawing. The intermediate piece 12" preferably is fashioned from sheet copper, and, owingv to thes'hape-of the intermediate piece 12, and'to the circumstance that it is formed of sheet copper, the intermediate piece is capable of expanding and contracting much more freely than are the membersfi and 7 of the casing 5, the members 6 and 7 generally being formed from wrought iron.

The intermediate piece 12 is arranged issubstantially concentric relation withrespect to the casing 5, and one of the side walls 50 of the'intermediate piecejis welded directly,- as

indicatedat 14, to the inner end of the mem- 0 i her 7 of the casing'5,'theother of the side 7 walls 51 of the intermediate piece being Welded directly to the inner end of the memv her 6 of the casing. i

7 It will" be understood readily that, owing 8 l to the provision of the intermediate piece12,

the casing 5 can yieldv somewhat, and there will be no leakage at the place where the pipe 3 passes into the shell2,-.it being'reca'lled that the passage of exhaust steam through the V stack will suck air into the smoke box, if there is any-leak through which the air can find entrance.

In the drawings, the casing 5 is shown on the outside of the shell 2, but a person skilled in the art will understand'readily that the casing 5 can be placed inside of the shell if, for any reason, such a constructionis conone being arranged in substantially concentric; V

Having thus described the invention, What is claimed is i The combination With the boiler shell of a locomotive engine, and a steam pipe entering the shell: of a tubular casing about the pipe,

one end of the casing being hermetically' closed aboutthe pipe, and the oppositeend of the casing being connected tothe shell, and an annular expansible intermediate piece fashioned from a metal which is more expansible than the casing,the intermediate piece being U-shaped in cross section and relation with respect to the axis of the casing, the U-shaped piece being interposedin the casin and se iaratin the casin into a a a: parts, the inner end of one part of the caslng being secured directly to one of the side Walls of the interni'ediatepiece, and the inner 611d l the 'other'part of the casing being se- 7 A quredidirectly t he other side wall of the. 1 I 1 intermediate piece," v j I W 1 p v In testimony that I claim theforegoi I have heretoalfixed my signature;

. JOHN THOMAS KELLY.

my own, 

